A homeowner who bought a modest three-bedroom house in 2019 might open a mortgage statement today and see something startling: six figures of equity that did not exist five years ago. Nationally, the typical mortgaged homeowner now holds roughly $300,000 in home equity, a figure supported by the upward price trajectory in the Federal Housing Finance Agency’s (FHFA’s) House Price Index (HPI). That wealth looks like a solution to every financial problem on the kitchen table: credit-card debt, a leaking roof, a child’s tuition bill, etc.
Borrowing against a house, however, carries costs that are easy to underestimate, from tax rules that quietly kill deductions to variable rates that can spike well past the number printed on a lender’s ad. Here is what the primary federal data and regulations actually say about borrowing against your house, what they leave out, and how to make a decision that you will not second-guess.
The equity is real, but measure it carefully
The FHFA House Price Index is the most reliable national gauge of home-price movement. This index tracks repeat-sale transactions on conforming mortgages, so it reflects actual closing prices rather than listing aspirations or algorithm-generated estimates. The most recent monthly data, released in early spring 2026, confirms that national prices remain elevated by historical standards, which is the main reason equity withdrawals are back on the table for millions of households.
“Elevated,” though, is not the same as “guaranteed.” The HPI is a national average, which means it does not provide a breakdown of trends across different U.S. markets. A homeowner in a market that ran up faster than the country as a whole, such as states like Florida or Texas following the pandemic, could face sharper pullbacks if conditions reverse. The national release does not break out metro-level erosion risk in fine detail, so borrowers in those markets should cross-check the broad trend against local sales comps before treating an online home-value estimate as bankable equity.
A key takeaway is that if you are considering a home equity line of credit (HELOC), a fixed-rate home equity loan, or a cash-out refinance, get a conservative appraisal and then subtract at least 15 to 20 percent as a cushion. That buffer protects you from owing more than the house is worth if prices soften, which is a scenario that trapped millions of borrowers after 2008.
The tax trap most borrowers miss
Many homeowners assume that interest on any home-secured loan is tax-deductible, but this is not the case. The IRS spells this out in Publication 936, its official guidance on the home mortgage interest deduction. The rule is straightforward: interest on home equity debt qualifies for a deduction only when homeowners use the borrowed funds to buy, build, or substantially improve the home that secures the loan. If homeowners use the funds for other reasons, such as to pay off credit cards, cover tuition, or fund a vacation, then the deduction vanishes.
That distinction changes the math more than most people realize. If you take a $75,000 HELOC at 8.5 percent to consolidate high-interest debt, for instance, then you will pay roughly $6,375 in interest the first year. If you are in the 24 percent federal tax bracket and expected to deduct that interest, then you were counting on saving about $1,530 at tax time. Losing that deduction results in an increase in your effective borrowing cost by that amount every single year. Over a ten-year repayment window, the gap between what you expected to pay and what you actually owe can run well into five figures.
Additionally, the Tax Cuts and Jobs Act of 2017 capped the total mortgage debt eligible for the interest deduction at $750,000 for loans originated after December 15, 2017. The older $1 million cap still applies to pre-2018 loans. Homeowners who already carry a large primary mortgage may find that a new equity loan pushes them over the threshold, wiping out the deduction on the excess even if the funds go toward qualifying improvements. Publication 936 walks through the calculation, but it is dense. Taxpayers with complex situations can book an appointment through the IRS local office locator for case-specific guidance.
It is worth noting that Publication 936 currently carries a 2025 revision date. No official IRS update has confirmed whether 2026 legislation will change the deductibility rules. Borrowers planning to take out equity now and deduct interest on their 2026 returns should treat the current rules as the best available guidance while keeping an eye on any congressional action.
What your lender must tell you, and why you should actually read it
Federal law requires lenders to hand you a stack of disclosures before a HELOC closes. Those documents are governed by Regulation Z, the Consumer Financial Protection Bureau’s (CFPB’s) implementation of the Truth in Lending Act (12 CFR Part 1026). This regulation covers open-end credit secured by a dwelling and mandates specific timing, model forms, and plain-language explanations of variable-rate risks.
Most borrowers skim these pages or skip them entirely, but they contain some important information. The disclosures lay out the mechanical blueprint of your loan: the index your rate is tied to (usually the prime rate), the margin your lender adds on top, the lifetime rate cap, and the schedule for rate resets. A HELOC advertised at 7.5 percent today might carry a lifetime cap of 18 percent, for example. If the prime rate climbs, then your monthly payment could double or more during the repayment period, which is the period when you can no longer draw funds and must start paying down principal.
Before you sign, it is worth considering whether you can handle the worst-case payment. Take the maximum rate disclosed in the Reg Z paperwork, apply it to your expected balance, and calculate the monthly payment. If that number would strain your household budget, the loan is riskier than the introductory rate suggests, no matter how attractive the initial terms look.
An important point to make is that a fixed-rate home equity loan locks your interest rate for the life of the loan, eliminating the variable-rate risk that makes HELOCs unpredictable. The trade-off is that you receive a lump sum rather than a revolving credit line, and the starting rate is often slightly higher. For borrowers who know exactly how much they need and want payment certainty, a fixed-rate HEL deserves a serious look alongside a HELOC.
What we still do not know
Honest advice requires acknowledging the gaps. As of spring 2026, no primary FHFA or National Mortgage Database release has published HELOC-specific delinquency rates or default-risk breakdowns for the current cycle. Without that data, any claim about how today’s equity borrowers are performing relies on secondary reports rather than official figures.
The CFPB’s consumer complaint records for home equity products in the second quarter of 2026 have not been released either. Complaint trends can reveal whether lenders are meeting their disclosure obligations or cutting corners, but that signal is not yet available.
These knowledge gaps are important because they mean homeowners considering large withdrawals are making decisions without a complete, government-sourced picture of how similar borrowers are faring at current rate levels. That is not a reason to avoid equity borrowing altogether, but it is a reason to build in extra margin for error and to revisit the decision if new data shifts the landscape.
Four questions that keep the decision honest
Ultimately, the choice of whether to borrow against your house comes down to four tests:
1. Is the equity real? Check your home’s value against the FHFA House Price Index trend for your region, not just an online estimate. Get a professional appraisal if the loan amount is significant. Leave a cushion of at least 15 to 20 percent in untapped equity so a price dip does not put you underwater.
2. Will the interest be deductible? If you are using the funds to renovate, add on, or make substantial improvements to the home securing the loan, then the interest likely qualifies under current IRS rules. Conversely, if the money is going anywhere else, then assume no deduction and price the loan accordingly. Factor in the $750,000 cap if your total mortgage debt is already high.
3. Can you handle the worst-case payment? Read the Regulation Z disclosures. Find the lifetime rate cap. Calculate the maximum monthly payment on your expected balance. If that payment would force you to cut essentials or take on additional debt, then the loan is too large, or the terms are too risky.
4. Is there a cheaper way to get the money? For non-home uses, compare the after-tax cost of a HELOC or HEL to a personal loan, a zero-percent promotional balance transfer (watching for fees and expiration dates), or simply saving longer. A HELOC used for debt consolidation without the tax deduction can easily cost more than borrowers expect, especially if rates rise during the repayment period. Do not forget to account for closing costs, origination fees, and any annual fees the lender charges; those line items shrink the apparent savings of a lower rate.
For households with stable income and a clear, qualifying use of funds, a carefully sized equity loan can still be a smart move even at today’s rates. For those tempted to tap equity to plug budget gaps or finance spending they could delay, the math argues for patience. Prices are strong and the rules are clear. What we are still waiting for is the performance data that will tell us whether borrowers who acted on that strength are holding up. Until it arrives, leaving room for error is not pessimism; it is just good accounting.
